Yes and no.

Depending on enviroment

Swamp, boggy terrains trap large amounts of CO2. On the other hand, the anaerobic decomposition that often occurs in such enviroments can emit large amounts of methane.

And expanding forests creates a net loss, while cutting them down obviously emits CO2.

All in all, forest can't be simply be grown magically, not all areas are suitable for forests. And I don't see many countries capable of embarking into antidesertification campaigns like China succesfuly.

I'm pretty sure that even that whitepaper doesn't suggest something that is meant to resist inward pressure instead of outward pressure

Nobody is suggesting you build it with the materials of a thin pressure vessel .

Obviously, the containment would be built out of concrete.

Otherwise it would be impossible, it would collapse on itself by stress alone rather quickly.

Anyway, my point is that Hyperloop is like wanting to make the concorde without making the 707 first.

And it may very well like the concorde end up being not practical.

Frankly, I don't see the need to be faster than 400km/h . That's what videoconferences are for

Hyperloop CAN be realistically built.

But not with our current technology.

First we need to get regular maglevs on working order and then we can begin thinking on vaccum sealing them.

And then it probably will not make a difference, Hell, the amount of concrete needed may very well offset the energy consumption. Nevermind the issue of a single guy with a drill being able to stop the whole line (and maybe cause a big incident if a train happens to just be going through.)

Dam man, imagine being so hungry for mockery.